Electronic apparatus

ABSTRACT

An electronic apparatus includes a first housing that has a shape of a rectangle a second housing, and a connecting section that movably connects the first housing to the second housing. The first housing is formed of at least a first part that is attached to the second housing by the connecting section and forms one side of the rectangle and a second part that is bonded to the first part at a position closer to the one side, and an attaching surface of the first part and the second part has an attaching area that changes from both ends of the one side to the center thereof.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based upon and claims the benefit of priority of theprior Japanese Laid-open Patent No. 2008-168989, filed on Jun. 27, 2008,the entire contents of which are incorporated herein by reference.

FIELD

The embodiment discussed herein is related to an electronic apparatus inwhich a first housing is movably connected to a second housing.

BACKGROUND

A reduction in size and weight has been strongly desired for anelectronic apparatus such as a laptop personal computer, a cellularphone, and the like. For the electronic apparatus, a structure has beenwidely used in which a display housing provided with a display screen isopenably and closably connected to a main housing provided with akeyboard, push buttons and the like. Such a structure allows the user tofold the electronic apparatus in a way that the main housing and thedisplay housing overlap each other for carriage, and also to open thedisplay housing so as to use the keyboard and the push buttons foroperation. Thereby, the portability of the electronic apparatus isimproved without miniaturizing the keyboard and bush buttons. Meanwhile,there is a large demand for an increase in size of the display device.Several approaches have been taken to meet this demand, including:employing a display device using a thin and light liquid crystal panel;and arranging a light source, a control board and the like not besidethe liquid crystal panel but on the rear side thereof to widen a displayscreen by an amount corresponding to a narrowed space between thedisplay housing and the liquid crystal panel. In recent years, awide-type electronic apparatus has been marketed as a hot item in whicha display screen is widened up to a portion close to a side surface of adisplay housing.

By the way, the liquid crystal panel is formed by sealing a liquidcrystal element between multiple glass plates, and is easily broken dueto shock such as dropping. Particularly, in the wide-type electronicapparatus having a narrowed space between the display housing and theliquid crystal panel, shock of dropping is directly transmitted to theliquid crystal panel from the display housing. For this reason, ascompared with the conventional electronic apparatus having a sufficientspace between a display housing and a liquid crystal panel, shockresistance tends to decrease.

In order to protect the liquid crystal panel which is easily broken dueto shock such as dropping, it is preferable that the entire displayhousing be made of high-strength metal or the like. However, recently,laptop personal computers have been equipped with a radio communicationfunction, and an antenna for radio communications has been installed inthe display housing in many cases. Accordingly, when the entire displayhousing is made of metal, which is a conductive material, a radio waveis not able to be transmitted and received by the antenna. On the otherhand, when the entire display housing is made of plastic, which passesthe radio wave, the housing is thickened to obtain a sufficientstrength, resulting in a problem that the weight of the entire personalcomputer is increased. For this reason, by using a display housing, inwhich a metal member conforming to the shape of a liquid crystal panelis bonded to a plastic member larger than the size of the liquid crystalpanel (see Japanese Laid-open Patent Publication No. 2006-330127), theliquid crystal panel is attached to a portion of the metal member in thedisplay housing, and an antenna and the like are installed on a portionof the plastic member.

However, when the display housing is opened and closed to the mainhousing, a strong force is applied to a portion close to a hinge thatconnects these housings. Thus, repetition of opening and closing thedisplay housing may cause removal of the metal member from the plasticmember due to aging fatigue or the like. Furthermore, there has beenused a personal computer having a tablet mode in which the personalcomputer is used by rotating a display housing relative to a mainhousing and then by overlapping these housings with a display screendirected outside, and thus a force to be applied to a portion close to ahinge is considered to be more and more increased. For this reason,there is need to increase bonding strength between members that form thedisplay housing.

SUMMARY

According to an basic aspect of the invention, an electronic apparatusincludes:

a first housing that has a shape of a rectangle;

a second housing, and

a connecting section that movably connects the first housing to thesecond housing, wherein

the first housing is formed of at least a first part that is attached tothe second housing by the connecting section and forms one side of therectangle, and a second part that is bonded to the first part at aposition closer to the one side, and

an attaching surface of the first part and the second part has anattaching area that changes from both ends of the one side to the centerthereof.

The object and advantages of the invention will be realized and attainedby means of the elements and combinations particularly pointed out inthe claims.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and arenot restrictive of the invention, as claimed.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is an external view of a personal computer as a specific firstembodiment of an electronic apparatus;

FIG. 2 is an external perspective view illustrating a front side of thepersonal computer with a display unit closed on a main unit;

FIG. 3 is an external perspective view illustrating a rear side of thepersonal computer in the state illustrated in FIG. 2;

FIG. 4 is an external perspective view illustrating a state in which thedisplay unit overlaps the main unit with a display screen directedupward;

FIG. 5 is a view illustrating a state in which a housed antenna ishoused in the display unit;

FIG. 6 is a view illustrating a state in which the housed antenna iserected on the display unit;

FIG. 7 is an exploded view of the housed antenna;

FIG. 8 is a perspective view illustrating an assembled housed antennaseen from an upper cover side;

FIG. 9 is a view illustrating a rear cover of the display unit;

FIG. 10 is a view illustrating a boss member and a metal plate member;

FIG. 11 is a view illustrating a fixing bracket obtained by assemblingthe boss member and the metal plate member;

FIG. 12 is a view illustrating a state in which a liquid crystal panel,a camera board module and the fixing bracket are detached from the rearcover illustrated in FIG. 9;

FIGS. 13A and 13B are views illustrating a positional relationshipbetween a convex section of the metal plate member and a concave sectionof the housed antenna;

FIG. 14 is a view illustrating a rear cover of a display unit of apersonal computer having only the housed antenna;

FIG. 15 is a view illustrating a rear cover of a display unit of apersonal computer in which a rotary shaft of the housed antenna isprovided at a corner of the display unit;

FIG. 16 is a view illustrating a metal plate member to be fitted into aboss of the personal computer illustrated in FIG. 15;

FIG. 17 is a view illustrating a state in which the metal plate memberis attached to the rear cover illustrated in FIG. 15;

FIG. 18 is a view illustrating a state in which the housed antenna ishoused in the display unit;

FIG. 19 is a view illustrating a state in which the housed antenna iserected at 90 degrees to the display unit;

FIG. 20 is a view illustrating a state in which the housed antenna iserected at 180 degrees to the display unit;

FIGS. 21A and 21B are views illustrating a positional relationshipbetween a convex section of the metal plate member and a concave sectionof the housed antenna;

FIG. 22 is a view illustrating one example of a conventional rear cover;

FIG. 23 is a view illustrating a front side, to which a liquid crystalpanel is attached, of the rear cover;

FIG. 24 is a view illustrating a rear side of the rear cover illustratedin FIG. 23;

FIG. 25 is a view illustrating a state in which the liquid crystal panelis detached from the rear cover illustrated in FIG. 23;

FIG. 26 is a view illustrating one example of a rear cover of a versiondifferent from that illustrated in FIG. 25;

FIG. 27 is an enlarged view of a connecting section cover;

FIG. 28 is a view illustrating the personal computer from which theconnecting section cover is detached;

FIG. 29 is a view illustrating a keyboard;

FIG. 30 is a view illustrating the personal computer from which thekeyboard is detached;

FIG. 31 is a view illustrating an upper surface of an upper cover;

FIG. 32 is a view illustrating a lower surface of the upper cover;

FIG. 33 is a view illustrating a state in which the upper cover isdetached from the main unit;

FIG. 34 is a cross-sectional view illustrating a state in which thekeyboard mounted on a metal plate is cut in a depth direction of thepersonal computer;

FIG. 35 is a cross-sectional view illustrating a portion near anattachment piece in a state in which the keyboard is attached to theupper cover;

FIG. 36 is an enlarged view illustrating a state in which a connectingsection before being attached to a main housing is seen from the frontthereof;

FIG. 37 is an enlarged view illustrating a state in which the connectingsection before being attached to the main housing is seen from the rearthereof;

FIG. 38 is an enlarged view illustrating a state in which the connectingsection after being attached to the main housing is seen from the frontthereof;

FIG. 39 is an enlarged view illustrating a state in which the connectingsection after being attached to the main housing is seen from the rearthereof;

FIG. 40 is a cross-sectional view illustrating a state in which aconventional personal computer is cut in a depth direction; and

FIG. 41 is a cross-sectional view illustrating a state in which thepersonal computer of this embodiment is cut in a depth direction.

DESCRIPTION OF EMBODIMENT(S)

A specific embodiment for the basic aspect described above will beexplained with reference to the drawings.

FIG. 1 is an external view of a personal computer 10 being a specificfirst embodiment of the electronic apparatus.

The personal computer 10 includes a main unit 20 and a display unit 30.These main unit 20 and display unit 30 are connected to each otherthrough a biaxial connecting section 40 in such a way that the displayunit 30 is openable and closable with respect to the main unit 20 in adirection of an arrow A (hereinafter referred to as the direction A) androtatable (around a rotary shaft arranged perpendicular to the main unit20) in a direction of an arrow B (hereinafter referred to as thedirection B). The connecting section 40 corresponds to one example ofthe connecting section of the electronic apparatus. FIG. 1 illustratesthe personal computer 10 with the display unit 30 opened to the mainunit 20 (opened state).

The main unit 20 has a main housing 25 which houses therein electroniccomponents such as a hard disk, various boards and the like, the mainhousing 25 including an upper cover 25A and a lower housing 25B. Inaddition, the main unit 20 includes a keyboard with multiple keys 21arranged, a track pad 22, a left click button 23 and a right clickbutton 24 on its upper surface. The main housing 25 corresponds to oneexample of the second housing of the electronic apparatus.

The display unit 30 of the personal computer 10 is one for displaying aresult of information processing executed by the main unit 20. Thedisplay unit 30 has a display housing 34 which houses therein a thinliquid crystal panel, a control circuit for the liquid crystal panel, anelectromagnetic induction-type digitizer or a touch panel, and the like,the display housing 34 including a front cover 34A and a rear cover 34B.The display housing 34 corresponds to one example of the first housingof the electronic apparatus. Moreover, the display housing 34 includesmultiple push buttons 32 at a lower portion of a display screen 31. Thedisplay housing 34 also includes on its upper end surface a housedantenna 50 housable in the display housing 34.

FIG. 2 is an external perspective view illustrating a front side of thepersonal computer 10 with the display unit 30 closed on the main unit20. FIG. 3 is an external perspective view illustrating a rear side ofthe personal computer 10 in the state illustrated in FIG. 2.

In FIG. 2, the display unit 30 overlaps the main unit 20 with thedisplay screen 31 (see FIG. 1) directed toward the main unit 20. Thisstate is hereinafter called as a first closed state.

When the display unit 30 being in the opened state as illustrated inFIG. 1 is closed in the direction A, as illustrated in FIG. 2, thedisplay screen 31 is hidden and a surface opposed to the display screen31, that is, a rear side of the display housing 34 is exposed. This isthe state called the first closed state. In the first closed state, theuser can carry the personal computer 10 while preventing the displayscreen 31 from being stained and damaged.

As illustrated in FIG. 3, screws 26 are attached to the rear side of themain unit 20. The screws 26 fix the connecting section 40 to the mainunit 20. The main unit 20 also includes an air inlet 28 on its rearside. The air inlet 28 takes in air to the inside of the main unit 20.The air thus taken in from the air inlet 28 absorbs heat generated byvarious electronic components and is exhausted from an outlet (notillustrated) provided on a side surface of the main unit 20.

FIG. 4 is an external perspective view illustrating a state in which thedisplay unit 30 overlaps the main unit 20 with the display screen 31directed upward.

The state illustrated in FIG. 4 can be obtained by rotating the displayunit 30 by 180 degrees in the direction B from the state illustrated inFIG. 1 so that the display screen 31 may be directed to a side opposedto the keyboard, and then, under this state, by overlapping the displayunit 30 on the main unit 20 with a surface of the display unit 30opposed to the display screen 31 directed toward the main unit 20. Thisstate is called a second closed state. The second closed state is a modein which the personal computer 10 is used as a tablet PC (tablet mode).

The personal computer 10 is basically configured as mentioned above.

Sequentially, each section of the personal computer 10 will be explainedin detail.

(Antenna)

First, the housed antenna 50 illustrated in FIG. 1 will be explained.

FIG. 5 is a view illustrating a state in which the housed antenna 50 ishoused in the display unit 30. FIG. 6 is a view illustrating a state inwhich the housed antenna 50 is erected on the display unit 30.

The display housing 34 includes on its upper end surface an antennahousing groove 61 extending in a width direction of the display housing34. As illustrated in FIG. 5, the housed antenna 50 is housed inside theantenna housing groove 61 (housed position).

Moreover, the antenna housing groove 61 includes a notch 62 on its endportion. The user can erect the housed antenna 50 on the display housing34 as illustrated in FIG. 6 (protruding position) by putting his/herfinger in the notch 62 to pull up the housed antenna 50.

FIG. 7 is an exploded view of the housed antenna 50.

The housed antenna 50 includes a plate piece-like upper cover 51, anantenna 52 and a lower cover 53. The upper cover 51 has a through-hole51 a on its one end side. The antenna 52 and the lower cover 53 havethrough-holes 52 a and 53 a, respectively, at positions eachcorresponding to the through-hole 51 a. The housed antenna 50 isassembled in such a manner that the antenna 52 is fitted into the lowercover 53 and the upper cover 51 is attached to the lower cover 53. Theupper cover 51 and the lower cover 53 are formed of flexible materialssuch as elastomer, rubber (NBR, silicone rubber, CR), sheet (PET, PC)and the like. Further, any antenna such as a FPC antenna, a boardantenna, a plate antenna or the like may be used as the antenna 52.

FIG. 8 is a perspective view illustrating the assembled housed antenna50 seen from the upper cover 51 side.

As illustrated in FIG. 8, the housed antenna 50 has an insertion opening54. A boss 82A (see FIG. 9) provided in the display unit 30 is insertedinto the insertion opening 54. A bearing portion 55 that forms an edgeof the insertion opening 54 has multiple concave sections 56 thatsurround the insertion opening 54. The insertion opening 54 is fixed tothe antenna 52 so as to be electrically conducted therewith by apredetermined fixing method such as soldering, caulking, bonding,screwing and the like.

FIG. 9 is a view illustrating the rear cover 34B of the display unit 30.

A liquid crystal panel 31A is attached to the rear cover 34B such thatthe display screen 31 may face the front. The rear cover 34B houses acamera board module 71, a built-in antenna (not illustrated), a fixingbracket 81 for fixing the housed antenna 50 illustrated in FIG. 8, andthe like in a free space beside the liquid crystal panel 31A. The fixingbracket 81 includes the boss 82A, a boss member 82, and a metal platemember 83. The boss 82A is inserted into the insertion opening 54 of thehoused antenna 50. The boss member 82 is directly fixed to the rearcover 34B by a screw 80. The metal plate member 83 is fitted into theboss 82A to thereby be indirectly fixed to the rear cover 34B, and thebearing portion 55 of the housed antenna 50 abuts thereon.

FIG. 10 is a view illustrating the boss member 82 and the metal platemember 83. FIG. 11 is a view illustrating the fixing bracket 81 obtainedby assembling the boss member 82 and the metal plate member 83.

The boss member 82 has the boss 82A, a fixing section 82B, and a legsection 82C. The boss 82A is inserted into the metal plate member 83 andthe housed antenna 50. The fixing section 82B is fixed to the rear cover34B of the display unit 30. The leg section 82C is a portion extendingin a direction opposed to the fixing section 82B. The metal plate member83 has engagement sections 83B and a ground leg piece 83A. Theengagement sections 83B surround the boss 82A inserted into the metalplate member 83. Moreover, the engagement sections 83B each have aconvex section 83C at its tip end. The ground leg piece 83A extends fromthe engagement section 83B to press-contact the leg section 82C of theboss member 82. The engagement section 83B has elasticity since it has aplate piece-like shape.

FIG. 12 is a view illustrating a state in which the liquid crystal panel31A, the camera board module 71 and the fixing bracket 81 are detachedfrom the rear cover 34B illustrated in FIG. 9.

The rear cover 34B includes a metal part 120 and a plastic part 110. Theplastic part 110 surrounds an outer periphery of the metal part 120. Thecamera board module 71, the built-in antenna (not illustrated) and thehoused antenna 50 are arranged on the plastic part 110. The plastic part110 allows transmission of radio waves transmitted and received to andfrom the built-in antenna. Moreover, a grounding part 130 made of metalis attached to the plastic part 110. The grounding part 130 extends fromthe metal part 120 to a position where the housed antenna 50 isinstalled.

The fixing bracket 81 is arranged on a rib 131 of the grounding part130. The boss member 82 of the fixing bracket 81 and the camera boardmodule 71 are fixed to the rear cover 34B by the screw 80 illustrated inFIG. 9. Sequentially, the boss 82A of the fixing bracket 81 is insertedinto the insertion opening 54 of the housed antenna 50. In this manner,the housed antenna 50 is indirectly fixed to the rear cover 34B.

The grounding part 130 extending from the metal part 120 comes incontact with the fixing bracket 81, whereby the housed antenna 50 isindirectly connected to the metal part 120 and is grounded.

Further, the boss 82A is inserted into the insertion opening 54, wherebythe convex section 83C of the metal plate member 83 (FIG. 10) is fittedinto the concave section 56 (FIG. 8) of the housed antenna 50.

FIG. 13 is a view illustrating a positional relationship between theconvex section 83C of the metal plate member 83 and the concave section56 of the housed antenna 50.

Under a state in which the housed antenna 50 is housed in the antennahousing groove 61 as illustrated in FIG. 5, the convex section 83C ofthe metal plate member 83 is fitted into the concave section 56 of thehousing antenna 50 as illustrated in FIG. 13A.

When the user puts his/her fingers in the notch 62 of the display unit30 and pulls up the housed antenna 50, the housed antenna 50 rotatesabout the boss 82A, so that engagement between the convex section 83C ofthe metal plate member 83 and the concave section 56 of the housingantenna 50 is released. Here, as illustrated in FIG. 13B, the engagementsection 83B of the metal plate member 83 is deformed by the bearingportion 55 of the housed antenna 50, so that the convex section 83C ispressed down. Thereby, the user is able to easily rotate the housedantenna 50. When the user further rotates the housed antenna 50 from thestate illustrated in FIG. 13B, the convex section 83C of the metal platemember 83 is fitted into a concave section 56 of the housed antenna 50different from the concave section 56 into which the convex section 83Chas been fit during the housed antenna 50 has been fit into the antennahousing groove 61, so that the state is returned to one illustrated inFIG. 13A. As a result, the housed antenna 50, which is erected at 90degrees to the display unit 30, is held as illustrated in FIG. 6.

Thus, according to this embodiment, the housed antenna 50, which ismovable between the housed position and the protruding position, can bemounted on the electronic apparatus without requiring a large space.This makes it possible to attach both the built-in antenna and thehoused antenna 50 in a narrow space beside the liquid crystal panel 31Ain the display unit 30 of the electronic apparatus and to improvecommunication performance. Moreover, when no communication function isused, the housed antenna 50 can be housed in the display housing. Also,it is possible to use the housed antenna 50 with being erected at aplace where a radio wave condition is bad.

Herein, the explanation of this embodiment is once stopped and apersonal computer of a different version having a housed antenna will beexplained.

First, a description will be given of the personal computer having onlythe housed antenna 50 as the antenna in the display unit.

When the built-in antenna is mounted beside the liquid crystal panel31A, a portion where the built-in antenna is arranged needs to be formedby using plastic or the like that easily transmits a radio wave.However, the housed antenna 50 is erected outside the housing when beingused, and therefore a portion where the housed antenna 50 is arrangedmay be formed of metal.

FIG. 14 is a view illustrating a rear cover 34_1B of a display unit of apersonal computer 11 having only the housed antenna 50.

In the personal computer 11 of the different version illustrated in FIG.14, the entire surface, where the liquid crystal panel 31 and the housedantenna 50 are attached, of the rear cover 34_1B is formed of metal. Aboss 82_1A is formed so as to protrude from the rear cover 34_1B.Accordingly, the boss 82_1A is formed of metal, similar to the rearcover 34_1B. When the entire surface, where the housed antenna 50 isattached, of the rear cover 34_1B is formed of metal in this manner, thehoused antenna 50 is grounded by inserting the boss 82_1A into theinsertion opening 54 of the housed antenna 50. For this reason, thegrounding part 130 (see FIG. 12) and the boss member 82 (see FIG. 9) canbe omitted. However, when radio wave intensity is insufficient only fromthe housed antenna 50, it is preferable that a portion where the antennais arranged be formed of plastic or the like and both the built-inantenna and the housed antenna be mounted as illustrated in FIG. 9.

Next, a description will be given of a personal computer 12 in which arotary shaft of the housed antenna 50 is provided at a corner of adisplay unit 30_2.

FIG. 15 is a view illustrating a rear cover of the display unit 30_2 ofthe personal computer 12 in which the rotary shaft of the housed antenna50 is provided at the corner of the display unit 30_2.

In the personal computer 12 illustrated in FIG. 15, a boss 82_2A isformed at at least one (upper left side in this embodiment) of fourcorners of the display unit 30_2. Additionally, at the base of the boss82_2A, four ribs 84 are formed at positions separated from one anotherin the display unit 30_2.

FIG. 16 is a view illustrating a metal plate member 90 to be fit intothe boss 82_2A of the personal computer 12 illustrated in FIG. 15.

The metal member 90 illustrated in FIG. 16 has two convex sections 92 atpositions, being separated from each other, on an upper surface of amain body 91 having a through-hole into which the boss 82_2A is to beinserted. Note that, the metal plate member 90 has no ground leg piece83A unlike the metal plate member 83 illustrated in FIG. 10.

FIG. 17 is a view illustrating a state in which the metal plate member90 is attached to the rear cover illustrated in FIG. 15.

The metal plate member 90 is attached to the boss 82_2A in a state wherethe ribs 84 and the convex sections 92 of the display unit 30_2 areshifted from each other. Further, the housed antenna 50 is attached sothat the convex section 92 of the metal plate member 90 may be fit intothe concave section 56 of the housed antenna 50 illustrated in FIG. 8.

FIG. 18 is a view illustrating a state in which the housed antenna 50 ishoused in the display unit 30_2. FIG. 19 is a view illustrating a statein which the housed antenna 50 is erected at 90 degrees to the displayunit 30_2. FIG. 20 is a view illustrating a state in which the housedantenna 50 is erected at 180 degrees to the display unit 30_2.

In the personal computer 12, the antenna housing groove 61 extends froma position closer to the center of the display unit 30_2 to the cornerthereof in one side of the peripheral edge of the display unit 30_2. Thehoused antenna 50 can be adjusted to a first protruding position and asecond protruding position. In the first protruding position, the housedantenna 50 is rotated about the boss 82_2A at 90 degrees from the housedposition where it is housed in the display unit 30_2 and protrudes fromthe display unit 30_2. In the second protruding position, the housedantenna 50 is rotated about the boss 82_2A at 180 degrees from thehoused position and protrudes from the display unit 30_2. Here, the sideof the peripheral edge in which the antenna housing groove 61 is formedmay be any side of an upper side of the display unit 30_2.

FIG. 21 is a view illustrating a positional relationship between theconvex section 92 of the metal plate member 90 and the concave section56 of the housed antenna 50.

In a state in which the housed antenna 50 is housed in the display unit30_2 as illustrated in FIG. 18, the convex section 92 of the metal platemember 90 is fitted into the concave section 56 of the housed antenna 50as illustrated in FIG. 21A.

When the user pulls up the housed antenna 50, the housed antenna 50rotates about the boss 82_2A, so that the convex section 92 of the metalplate member 90 is pulled out from the concave section 56 of the housedantenna 50 as illustrated in FIG. 21B. In the personal computer 12, theribs 84 of the display unit 30_2 and the convex sections 92 of the metalplate member 90 are arranged at positions different from each other.Thus, when the housed antenna 50 is rotated, the convex section 92 ispushed down by the elasticity of the main body 91, thereby making itpossible to release the engagement between the housed antenna 50 and themetal plate member 90.

When the housed antenna 50 is further rotated, the convex section 92 ofthe metal plate member 90 is fitted into the concave section 56 of thehoused antenna 50 and the housed antenna 50 is locked with being erectedat 90 degrees to the display unit 30_2 (see FIG. 19). When the housedantenna 50 is furthermore rotated from this state, the housed antenna 50is locked with being erected at 180 degrees to the display unit 30_2(see FIG. 20).

Accordingly, in the personal computer 12, the housed antenna 50 can beheld at a different angle depending on a radio wave condition and aplace to be used, thus making it possible to enlarge the range of use.

It is noted that in this embodiment, as an example is given in which thehoused antenna 50 is mounted on the display units 30 and 30-2, thehoused antenna 50 may be mounted on the main unit 20. Even in anembodiment in which the housed antenna 50 is mounted on the main unit20, the housed antenna 50, which is movable between the housed positionand the protruding position, can be mounted on the electronic apparatuswithout having a large space.

This ends the description of the antenna.

Backing to the personal computer 10 illustrated in FIG. 1, the displayhousing 34 of the personal computer 10 will be next described.

(Display Housing)

As illustrated in FIG. 12, the rear cover 34B of the display housing 34has a structure in which the plastic part 110 surrounds the outerperiphery of the metal part 120.

FIG. 22 is a view illustrating one example of a conventional rear cover200.

When the entire rear cover is formed of metal having high strength inorder to protect the liquid crystal panel 31A from shock such asdropping, the built-in antenna is not able to be placed beside theliquid crystal panel 31A. For this reason, heretofore, the metal part210, which is conformed to the shape of the liquid crystal panel 31A, isbonded to the plastic part 220, which is larger than the size of theliquid crystal panel 31A, as illustrated in FIG. 22. In the rear cover200 having such a structure, when the display unit is opened and closedto the main unit, a strong force is applied to a portion near anattachment section 221 to which the connecting section is attached. Theforce concentrates on a bond boundary P on a side closer to theattachment section 221, and thus the metal part 210 maybe removed fromthe plastic part 220 due to aging fatigue. In the personal computer 10of this embodiment, such a defect is prevented by contriving anattaching surface of the plastic part and the metal part.

FIG. 23 is a view illustrating a front side, to which the liquid crystalpanel 31A is attached, of the rear cover 34B. FIG. 24 is a viewillustrating a rear side of the rear cover 34B illustrated in FIG. 23.

On the front side of the rear cover 34B, the liquid crystal panel 31A issurrounded by the plastic part 110. The plastic part 110 forms an outershape (rectangle) of the rear cover 34B. The plastic part 110 has at itslower end attachment sections 111 to which the connecting section 40 isattached.

Moreover, on the rear side of the rear cover 34B, the plastic part 110is exposed over the entire surface. A decorative cover (not illustrated)is attached to the plastic part 110.

FIG. 25 is a view illustrating a state in which the liquid crystal panel31A is detached from the rear cover 34B illustrated in FIG. 23.

As illustrated in FIG. 25, the rear cover 34B is structured in such amanner that the metal part 120 is fitted into the front side of theplastic part 110 by integral molding and bonding. Further, as theplastic part 110 and the metal part 120 come closer to end portions, ina width direction, of the rear cover 34B, an attaching area therebetweenis increased. A bond boundary Q therebetween has an arc shape extendingin a width direction using the attachment sections 111 as poles.Therefore, a force to be applied to the connecting section 40 isdispersed without concentrating on the bond boundary Q between theplastic part 110 and the metal part 120, thereby making it possible toprevent a defect in which the metal part 120 is removed from the plasticpart 110.

Moreover, in FIG. 25, the bond boundary Q between the plastic part 110and the metal part 120 has an arc shape extending in a width directionusing the attachment sections 111 as poles. However, the attachingsurface of the plastic part 110 and the metal part 120 may be formed inany shape as long as the attaching area is different between the centralportion and the end portions in the width direction of the rear cover34B.

FIG. 26 is a view illustrating one example of a rear cover of a versiondifferent from that in FIG. 25.

On a rear cover 34B_1, an area of an attaching surface of a plastic part110_1 and a metal part 120_1 is increased toward the central portion ina width direction of a rear cover 34B_1, and a bond boundarytherebetween has a linear shape. Thus, even when the attaching areabetween the plastic part 110_1 and the metal part 120_1 is decreasedtoward end portions in the width direction of the rear cover 34B_1, thisprovides an effect of reducing a defect in which the metal part 120_1 isremoved from the plastic part 110_1.

It is noted that, in addition to general plastic, reinforced plasticcontaining glass fiber or carbon may be used as material for the plasticparts 110 and 110_1. Further, it is possible to use magnesium alloy,aluminum, titanium or the like as material for the metal parts 120 and120_1. Furthermore, the metal parts 120 and 120_1 may be replaced withparts of other material such as a carbon plate or the like.

Sequentially, a description will be given of a method of attaching akeyboard of the personal computer 10.

(Keyboard Attachment Method)

The main housing 25 illustrated in FIG. 1 houses electronic componentsin the space formed of the upper cover 25A and the lower housing 25B.Moreover, the upper cover 25A has a resin-made keyboard, with themultiple keys 21 arranged, mounted on its upper surface and a connectingsection cover 310 (see FIG. 27) for covering the connecting section 40fit thereto.

FIG. 27 is an enlarged view of the connecting section cover 310. FIG. 28is a view illustrating the personal computer 10 from which theconnecting section cover 310 is detached.

As illustrated in FIG. 27, the connecting section cover 310 has screwholes 311 for fixing the connecting section cover 310 and the main unit20 to each other. As illustrated in FIG. 28, the connecting section 40,wires, and the like are exposed in the state where the connectingsection 40 is attached to the main unit 20. The connecting section cover310 is attached to the main unit 20 for covering up these parts.

FIG. 29 is a view illustrating a keyboard 320. FIG. 30 is a viewillustrating the personal computer 10 from which the keyboard 320 isdetached.

The keyboard 320 is formed of a sheet and the multiple keys 21 arrangedon the sheet in a predetermined matrix. Moreover, at front and rearperipheral edge portions of the basic body of the keyboard 320, thekeyboard 320 has multiple attachment pieces 321, which protrude from aperipheral portion of the keyboard 320, for attaching the keyboard 320to the upper cover 25A of the main unit 20. The attachment pieces 321are one example of the attachment section. As illustrated in FIG. 30,the upper cover 25A has an opening 331. A metal plate 332 is fixed tothe main unit 20 so as to cover the opening 331.

FIG. 31 is a view illustrating an upper surface of the upper cover 25A.FIG. 32 is a view illustrating a lower surface of the upper cover 25A.

The upper cover 25A has multiple attachment openings 333. The attachmentopenings 333 are one example of the fixing section. The keyboard 320 ismounted on the metal plate 332 in such a manner that the attachmentpieces 321 are inserted into the attachment openings 333 and fixed ontothe metal plate 332. Further, as illustrated in FIG. 32, the metal plate332 is fixed to the lower surface of the upper cover 25A by screws 334so as to cover the opening 331 illustrated in FIG. 31 from the lowersurface side.

FIG. 33 is a view illustrating a state in which the upper cover 25A isdetached from the main unit 20.

The lower housing 25B houses electronic components 410 such as a harddisk device, various boards and the like. When the upper cover 25A isfixed to the lower housing 25B, the electronic components 410 come incontact with the metal plate 332 which is fitted into the upper cover25A. In this way, the portion of the upper cover 25A on which thekeyboard 320 is mounted is formed of metal, whereby heat generated bythe electronic components 410 is absorbed and dissipated by the metalplate 332.

The upper cover 25A is attached to the lower housing 25B illustrated inFIG. 33 and the attachment pieces 321 of the keyboard 320 are insertedinto the attachment openings 333 of the upper cover 25A, whereby thekeyboard 320 is mounted on the metal plate 332. Here, as a structure formounting the keyboard 320 on the upper cover 25A, it is possible to usea structure that fixes the attachment pieces 321 to the upper cover 25Aby screws, and a structure that provides a slide type claw on thekeyboard 320 to hook the claw on the upper cover 25A. Moreover, it maybe possible to use a structure that screws the attachment pieces 321 ofthe keyboard 320 to the upper cover 25A.

FIG. 34 is a cross-sectional view illustrating a state in which thekeyboard 320 mounted on the metal plate 332 is cut in a depth directionof the personal computer 10.

As illustrated in FIG. 34, the metal plate 332 is formed so that frontand rear end sides thereof, where the attachment pieces 321 of thekeyboard 320 are provided, may be thin and the other portion may bethicker toward the central portion thereof away from the sides where theattachment pieces 321 are provided. Therefore, the keyboard 320 ismounted in a state in which it is upwardly curved in an arc shape wherethe front and rear end sides are used as end portions, thereby making itpossible to reduce a feeling that a key on the keyboard 320 is sinkingwhen the user depresses the keys on the keyboard 320.

The cross-section of the metal plate 332 may have a shape where only thecentral portion rises, in addition to the shape that smoothly rises inthe depth direction from the surrounding of the keyboard to the portionclose to the center as illustrated in FIG. 34. Moreover, instead offorming the risen shape on the basis of a difference in thickness, thecentral portion of a metal plate having a uniform thickness may benarrowed to form a stepped portion so as to be used as the equivalentshape. Further, the structure may be formed by using multiple parts,instead of using a single part, such that, for example, a flat plate anda different part bonded onto the flat plate may form a shape where thecentral portion rises. In this case, the number of parts to be bondedmay be single or multiple.

In this embodiment, the keyboard 320 is structured so that the crosssection in the front and back direction (depth direction) of thekeyboard 320 may have a convex shape. However, the keyboard 320 may bestructured so that the cross section in the left and right direction ofthe keyboard 320 may have a convex shape. In this case, the attachmentpieces 321 of the keyboard 320 are formed at side ends of the keyboard320.

FIG. 35 is a cross-sectional view illustrating a portion close to theattachment piece 321 in a state where the keyboard 320 is attached tothe upper cover 25A.

As illustrated in FIG. 35, the attachment openings 333 formed on theupper cover 25A are formed under the position where the attachmentpieces 321 of the keyboard 320 are provided. Accordingly, the attachmentpieces 321 enter the lower side than a reference surface R horizontal tothe attachment pieces 321 and are fixed to the upper cover 25A, andtherefore the keyboard 320 is curved upwardly. In this manner, theattachment openings 333 are formed under the reference surface R,thereby making it possible to more surely curve the keyboard 320upwardly and maintain a good operational feeling of the keyboard 320 fora long time.

Actually, by curving the keyboard 320 upwardly by 0.1 mm with respect tothe metal plate 332, a sense of discomfort like a spongy touch whendepressing keys 21 is eliminated and a good operational feeling can beobtained.

A description will be next given of a method for attaching theconnecting section 40 to the main housing 25.

(Method for Attaching the Connecting Section)

FIG. 36 is an enlarged view illustrating a state in which the connectingsection 40 before being attached to the main housing 25 is seen from thefront. FIG. 37 is an enlarged view illustrating a state in which theconnecting section 40 before being attached to the main housing 25 isseen from the rear.

The connecting section 40 has a first member 41, a second member 42,front fastening sections 43 and rear fastening sections 44. The firstmember 41 opens and closes the display unit 30 about a horizontal firstaxis (direction of an arrow A_1). The second member 42 rotates thedisplay unit 30 about a second axis (direction of an arrow B_1) crossingthe first axis. The front fastening sections 43 are screwed to fixedpositions 410 formed on the metal plate 332 of the main housing 25 onthe front side. The back fastening sections 44 are screwed to fixedpositions 420 formed on the lower housing 25B of the main housing 25 onthe rear side. The front side of the main housing 25 corresponds to oneside and the rear side thereof corresponds to the other side facing thefront side.

FIG. 38 is an enlarged view illustrating a state in which the connectingsection 40 after being attached to the main housing 25 is seen from thefront. FIG. 39 is an enlarged view illustrating a state in which theconnecting section 40 after being attached to the main housing 25 isseen from the rear.

The connecting section 40 is fixed to the metal plate 332 on the frontside of the personal computer 10 by fastening screws 27 to the frontfastening sections 43, and is fixed to the lower housing 25B on the rearside of the personal computer 10 by fastening the screws 26 to the rearfastening sections 44.

FIG. 40 is a cross-sectional view illustrating a state in which aconventional personal computer is cut in a depth direction.

As illustrated in FIG. 40, in the conventional personal computer, aconnecting section 530 is fixed to a lower housing 522 by pinching anupper cover 521 of a main unit 520 with screws 542, and is fixed to thelower housing 522 in front of a shaft 511 of a display unit 510 byscrews 541. Therefore, when the connecting section 530 is pulledrelative to the main unit 520 at the time of opening and closing thedisplay unit 510, there is a possibility that a defect will occur inwhich a surface of the upper cover 521 fixed to the connecting section530 by the screws 541 and 542 is distorted as if it swelled on thesurface.

FIG. 41 is a cross-sectional view illustrating a state in which thepersonal computer 10 of this embodiment is cut in a depth direction.

In the personal computer 10 of this embodiment, the connecting section40 is fixed to the metal plate 332 by the screws 27. Even when theconnecting section 40 is pulled at the time of opening and closing thedisplay unit 30, the force is transmitted to the upper cover 25A throughthe metal plate 332, and therefore it is possible to prevent the uppercover 25A from being deformed. Moreover, the connecting section 40 isalso fixed to the lower housing 25B on the rear side of the main unit 20by the screws 26. However, it is fixed at a position away from thesurface of the upper cover 25A, and therefore it is possible to reducean influence on the upper cover 25A.

Thus, according to the personal computer 10 of this embodiment, it ispossible to reduce the defect in which the surface of the upper cover isdistorted at the time of opening and closing the display unit.

The tablet type personal computer has been taken as an example of theelectronic apparatus above; however, the electronic apparatus disclosedin the present case may be applied to a personal computer having notablet function such as a PDA, a game machine, an electronic notebook,and the like.

Furthermore, the liquid crystal panel has been taken as an example ofthe display panel above; however, the display panel to be mounted on theelectronic apparatus disclosed in the present case may be a plasmadisplay, a field emission display, an organic EL display, or the like.

As has been described above, according to the basic aspect of theelectronic apparatus of the present invention, it is possible to reducea defect in which bond between members that form the housings isremoved.

All examples and conditional language recited herein are intended forpedagogical purposes to aid the reader in understanding the principlesof the invention and the concepts contributed by the inventor tofurthering the art, and are to be construed as being without limitationto such specifically recited examples and conditions, nor does theorganization of such examples in the specification relate to a showingof the superiority and inferiority of the invention. Although theembodiment(s) of the present invention(s) has(have) been described indetail, it should be understood that the various changes, substitutions,and alterations could be made hereto without departing from the spiritand scope of the invention.

1. An electronic apparatus comprising: a first housing that has a shapeof a rectangle; a second housing, and a connecting section that movablyconnects the first housing to the second housing, wherein the firsthousing is formed of at least a first part that is attached to thesecond housing by the connecting section and forms one side of therectangle, and a second part that is bonded to the first part at aposition closer to the one side, and an attaching surface of the firstpart and the second part has an attaching area that changes from bothends of the one side to the center thereof.
 2. The electronic apparatusaccording to claim 1, wherein the attaching surface has an arc-shapedattaching boundary formed by the both ends and the center with thecenter of the one side defined as a pole.
 3. The electronic apparatusaccording to claim 1, wherein the attaching surface has an attachingarea that decreases from the both ends of the one side to the centerthereof.
 4. The electronic apparatus according to claim 1, wherein thefirst part and the second part are made of different materials.
 5. Theelectronic apparatus according to claim 5, wherein the first part ismade of a resin material and the second part is made of a metalmaterial.
 6. The electronic apparatus according to claim 1, wherein theconnecting section connects the first housing to the second housing insuch a way that the first housing is openable and closable with respectto the second housing about a first axis parallel to the one side. 7.The electronic apparatus according to claim 7, wherein the connectingsection is provided at the center of one side.
 8. The electronicapparatus according to claim 8, wherein the connecting section has asecond axis crossing the first axis.
 9. The electronic apparatusaccording to claim 7, wherein the connection section is formed of twoconnecting sections each having the first axis.
 10. The electronicapparatus according to claim 1, wherein the first housing is a displaysection having a display panel built-in and the second housing is a bodysection generating display screen information to be displayed on thedisplay panel.